/usr/share/man/man8/courierpop3login.8.gz is in courier-pop 0.73.1-1.6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man8/courierpop3d.8.gz
/usr/share/man/man8/courierpop3d.8.gz